During the Summer holidays, Sakura and her class are preparing to present a play at the annual Nadeshiko Festival. The unexpected arrival of Syaoran (and Meiling) give Sakura the courage to finally reciprocate her feelings. But as the cards begin to disappear one by one, Sakura discovers a single card still remains. One with power equal to all hers... It is during this summer that Sakura faces her final battle.